Malicious PDF — malware analysis report

Static analysis result for SHA-256 8126c1e2e3491ce1…

MALICIOUS

PDF

45.4 KB Created: 2021-09-16 13:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4636336b4c343ff769dbb90b85d93c37 SHA-1: 8606100de3f18c68219d434f516b3b4d1ebdb242 SHA-256: 8126c1e2e3491ce140f0c620679d9812fe8a614fb1b78a456071b2fe6df3f0ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5469

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=how+to+get+iphone+font+and+emojis+on+android PDF link annotation
    • https://foodphotoshop.com/userfiles/files/45070433676.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ecce42c8e---buxekofasarosu.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/5122557130.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/77194231531.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/20126060619.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138bb14380cd---99371911886.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/temujepetojijojuvo.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/28373877637.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/takavofurepivapupozekaz.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/63661360624.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/todosowabujevelis.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/rakevoguxabudipisovodi.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/47427819523.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/91326172049.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/8569623558.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/xoxosiju.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/41506792868.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/takepopezoga.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/24328965134.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/30831666240.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c066df9a68e7fdbebdf578db5755fca3/84815153063.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/muvuzir.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/50561117723.pdfIn PDF document text

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